Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your Sierra International 18-5260 Marine Tune Up Kit. This kit is designed with precision components to meet or exceed original equipment specifications for OMC Sterndrive and Cobra Stern Drive engines. Adhering to these instructions will help ensure optimal performance and longevity of your marine engine's ignition system.
Product Overview
The Sierra 18-5260 Tune Up Kit includes components crucial for maintaining the ignition system of Prestolite 8-cylinder engines in OMC Sterndrive and Cobra Stern Drive applications. Each part is manufactured to high standards to ensure reliable performance in demanding marine environments.
Figure 1: Sierra International 18-5260 Marine Tune Up Kit components.
Setup and Installation
Before beginning installation, ensure the engine is cool and the battery is disconnected to prevent accidental starting or electrical shock. Refer to your engine's specific service manual for detailed instructions on accessing and replacing ignition components.
Required Tools:
- Wrench set
- Screwdriver set
- Spark plug socket
- Feeler gauge (for points adjustment, if applicable)
- Dielectric grease
Installation Steps:
- Disconnect Battery: Always disconnect the negative battery terminal first.
- Remove Old Components: Carefully remove the existing spark plugs, distributor cap, rotor, and ignition points (if applicable), noting their orientation and wiring for correct reinstallation.
- Inspect and Clean: Inspect the distributor housing and surrounding areas for corrosion or damage. Clean as necessary.
- Install New Components:
- Install new ignition points and condenser (if included), ensuring proper gap and alignment according to engine specifications.
- Install the new rotor onto the distributor shaft.
- Install new spark plugs, ensuring they are correctly gapped and torqued to the manufacturer's specifications. Apply a thin layer of dielectric grease to the spark plug boots.
- Place the new distributor cap, ensuring it seats properly and the spark plug wires are connected to the correct terminals in the firing order.
- Reconnect Battery: Reconnect the battery, positive terminal first, then negative.
- Test Engine: Start the engine and check for proper operation.
Operating Considerations
After installing the tune-up kit, ensure all connections are secure and free from corrosion. A properly tuned ignition system contributes to efficient engine operation, fuel economy, and reduced emissions. Monitor engine performance for any changes, such as misfires or rough idling, which may indicate further adjustments or inspections are needed.
Maintenance
Regular maintenance of your marine engine's ignition system is vital for reliable performance. The frequency of maintenance depends on usage and operating conditions. It is recommended to inspect ignition components annually or every 100 hours of operation, whichever comes first.
Maintenance Checklist:
- Spark Plugs: Inspect for wear, fouling, or damage. Replace if necessary. Ensure correct gap.
- Distributor Cap and Rotor: Check for cracks, carbon tracking, or excessive wear on contacts. Replace if damaged.
- Ignition Points (if applicable): Inspect for pitting or burning. Adjust gap or replace as needed.
- Wiring: Check all ignition wires for cracks, fraying, or signs of corrosion. Ensure secure connections.
- Battery and Cables: Verify battery condition, electrical connections, and battery cable condition. Corrosion or undersized cables can lead to inadequate voltage, causing high temperatures and potential starter damage.
Troubleshooting Common Issues
If you experience issues after installing the tune-up kit, consider the following:
| Symptom | Possible Cause | Solution |
|---|---|---|
| Engine cranks but won't start | Incorrect spark plug gap, faulty ignition points, incorrect wiring, low battery voltage. | Check spark plug gap, inspect and adjust/replace ignition points, verify wiring order, test battery and connections. |
| Rough idling or misfires | Fouled or incorrectly gapped spark plugs, worn distributor cap/rotor, loose connections. | Inspect and clean/replace spark plugs, check distributor components for wear, tighten all electrical connections. |
| Starter motor issues (slow crank, no crank) | Low battery charge, corroded battery cables/terminals, undersized cables. | Charge battery, clean battery terminals and cable ends, ensure correct cable gauge. |
Note: Marine starters and alternators must be ignition-protected to reduce explosion risk and sealed to prevent water intrusion and corrosion. Always ensure your components meet Coast Guard compliance and UL standards for marine applications.
Specifications
- Model Number: 18-5260
- Compatibility: OMC Sterndrive/Cobra Stern Drive (Prestolite 8 Cyl.)
- Interchangeable with: GLM 72650, Evinrude/Johnson 173829, 987926, Mallory 9-29304, 9-29309, OMC 173829, 987926
- Armature: High temperature epoxy for strength and wire insulation
- Magnets: Permanent magnet units for increased torque and longer life
- Bushings/Bearings: 90/10 copper bushings or heavy-duty needle bearings for extended service
- Marine Compliance: Meets or exceeds OEM output specifications, ignition-protected, sealed against water intrusion and corrosion, tested for Coast Guard compliance, UL standards for sterndrive and inboard applications, and International CE standards.
- Manufacturer: Sierra
- Product Dimensions: 1 x 1 x 1 cm
- Item Weight: 10 g
Video Resources
The following video provides additional information regarding Sierra starters and their features, which may be relevant to the components in your tune-up kit.
Video 1: Overview of Sierra Marine Starters. This video highlights key features of Sierra starters, including meeting OEM output, high-temp epoxy armatures, permanent magnets for torque and life, and compliance with marine safety standards (ignition-protected, sealed, Coast Guard, UL, CE approved). It also emphasizes the importance of checking battery condition, electrical connections, and battery cable condition to prevent starter damage from inadequate voltage.
Warranty Information
All Sierra products, including the 18-5260 Marine Tune Up Kit, are covered under Sierra's industry-leading customer satisfaction warranty. Sierra offers a limited lifetime warranty on its electric rotating components, providing comprehensive coverage for associated fees, including towing, parts replacement, incidental parts damage, and posted shop labor rates in the event of part failure. For detailed warranty terms and conditions, please refer to the official Sierra International website or contact customer support.
Support and Contact
For further assistance, technical support, or warranty claims, please contact Sierra International customer service. You can find contact information on the official Sierra International website or through your authorized dealer.
Website: www.sierraparts.com
Manufacturer: Sierra, LITCHFIELD, IL, 62056 US
